net/af_xdp: remove resources when port is closed

Since 18.11, it is suggested that driver should release all its private
resources at the dev_close routine. So all resources previously released
in remove routine are now released at the dev_close routine, and the
dev_close routine will be called in driver remove routine in order to
support removing a device without closing its ports.

Above behavior changes are supported by setting RTE_ETH_DEV_CLOSE_REMOVE
flag during probe stage.

Also as af_xdp pmd doesn't allocate MAC addresses dynamically, it needs
to be set as NULL, so it won't be released by rte_eth_dev_release_port()
otherwise, there would be "EAL: Error: Invalid memory" error.

Signed-off-by: Xiaolong Ye <xiaolong.ye@intel.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>

diff --git a/drivers/net/af_xdp/rte_eth_af_xdp.c b/drivers/net/af_xdp/rte_eth_af_xdp.c
index acf9ad6..35c7227 100644 (file)
--- a/drivers/net/af_xdp/rte_eth_af_xdp.c
+++ b/drivers/net/af_xdp/rte_eth_af_xdp.c
@@ -426,6 +426,19 @@ remove_xdp_program(struct pmd_internals *internals)
                        XDP_FLAGS_UPDATE_IF_NOEXIST);
 }
 
+static void
+xdp_umem_destroy(struct xsk_umem_info *umem)
+{
+       rte_memzone_free(umem->mz);
+       umem->mz = NULL;
+
+       rte_ring_free(umem->buf_ring);
+       umem->buf_ring = NULL;
+
+       rte_free(umem);
+       umem = NULL;
+}
+
 static void
 eth_dev_close(struct rte_eth_dev *dev)
 {
@@ -444,6 +457,15 @@ eth_dev_close(struct rte_eth_dev *dev)
        }
 
        (void)xsk_umem__delete(internals->umem->umem);
+
+       /*
+        * MAC is not allocated dynamically, setting it to NULL would prevent
+        * from releasing it in rte_eth_dev_release_port.
+        */
+       dev->data->mac_addrs = NULL;
+
+       xdp_umem_destroy(internals->umem);
+
        remove_xdp_program(internals);
 }
 
@@ -459,19 +481,6 @@ eth_link_update(struct rte_eth_dev *dev __rte_unused,
        return 0;
 }
 
-static void
-xdp_umem_destroy(struct xsk_umem_info *umem)
-{
-       rte_memzone_free(umem->mz);
-       umem->mz = NULL;
-
-       rte_ring_free(umem->buf_ring);
-       umem->buf_ring = NULL;
-
-       rte_free(umem);
-       umem = NULL;
-}
-
 static struct
 xsk_umem_info *xdp_umem_configure(struct pmd_internals *internals)
 {
@@ -856,6 +865,8 @@ init_internals(struct rte_vdev_device *dev,
        eth_dev->dev_ops = &ops;
        eth_dev->rx_pkt_burst = eth_af_xdp_rx;
        eth_dev->tx_pkt_burst = eth_af_xdp_tx;
+       /* Let rte_eth_dev_close() release the port resources. */
+       eth_dev->data->dev_flags |= RTE_ETH_DEV_CLOSE_REMOVE;
 
        return eth_dev;
 
@@ -923,7 +934,6 @@ static int
 rte_pmd_af_xdp_remove(struct rte_vdev_device *dev)
 {
        struct rte_eth_dev *eth_dev = NULL;
-       struct pmd_internals *internals;
 
        AF_XDP_LOG(INFO, "Removing AF_XDP ethdev on numa socket %u\n",
                rte_socket_id());
@@ -936,12 +946,7 @@ rte_pmd_af_xdp_remove(struct rte_vdev_device *dev)
        if (eth_dev == NULL)
                return -1;
 
-       internals = eth_dev->data->dev_private;
-
-       rte_ring_free(internals->umem->buf_ring);
-       rte_memzone_free(internals->umem->mz);
-       rte_free(internals->umem);
-
+       eth_dev_close(eth_dev);
        rte_eth_dev_release_port(eth_dev);